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/*
* Copyright (c) 2019-2020, NVIDIA CORPORATION. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <assert.h>
#include <common/bl_common.h>
#include <mce.h>
#include <memctrl_v2.h>
#include <tegra_platform.h>
#include <tegra_private.h>
/*******************************************************************************
* Array to hold MC context for Tegra194
******************************************************************************/
static __attribute__((aligned(16))) mc_regs_t tegra194_mc_context[] = {
_START_OF_TABLE_,
mc_smmu_bypass_cfg, /* TBU settings */
_END_OF_TABLE_,
};
/*******************************************************************************
* Handler to return the pointer to the MC's context struct
******************************************************************************/
mc_regs_t *plat_memctrl_get_sys_suspend_ctx(void)
{
/* index of _END_OF_TABLE_ */
tegra194_mc_context[0].val = (uint32_t)ARRAY_SIZE(tegra194_mc_context) - 1U;
return tegra194_mc_context;
}
/*******************************************************************************
* Handler to restore platform specific settings to the memory controller
******************************************************************************/
void plat_memctrl_restore(void)
{
UNUSED_FUNC_NOP(); /* do nothing */
}
/*******************************************************************************
* Handler to program platform specific settings to the memory controller
******************************************************************************/
void plat_memctrl_setup(void)
{
UNUSED_FUNC_NOP(); /* do nothing */
}
/*******************************************************************************
* Handler to program the scratch registers with TZDRAM settings for the
* resume firmware
******************************************************************************/
void plat_memctrl_tzdram_setup(uint64_t phys_base, uint64_t size_in_bytes)
{
uint32_t sec_reg_ctrl = tegra_mc_read_32(MC_SECURITY_CFG_REG_CTRL_0);
uint32_t phys_base_lo = (uint32_t)phys_base & 0xFFF00000;
uint32_t phys_base_hi = (uint32_t)(phys_base >> 32);
/*
* Check TZDRAM carveout register access status. Setup TZDRAM fence
* only if access is enabled.
*/
if ((sec_reg_ctrl & SECURITY_CFG_WRITE_ACCESS_BIT) ==
SECURITY_CFG_WRITE_ACCESS_ENABLE) {
/*
* Setup the Memory controller to allow only secure accesses to
* the TZDRAM carveout
*/
INFO("Configuring TrustZone DRAM Memory Carveout\n");
tegra_mc_write_32(MC_SECURITY_CFG0_0, phys_base_lo);
tegra_mc_write_32(MC_SECURITY_CFG3_0, phys_base_hi);
tegra_mc_write_32(MC_SECURITY_CFG1_0, (uint32_t)(size_in_bytes >> 20));
/*
* MCE propagates the security configuration values across the
* CCPLEX.
*/
(void)mce_update_gsc_tzdram();
}
}
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